ID: 278

AQSQID: 110010043

Site Name: Mcmillan Reservoir

Added: April 21, 2020, 6:24 p.m.

Updated: May 24, 2022, 9:17 a.m.

Location: Washington (Bloomingdale), DC

Reporting: True, Located: True

Current AQI: 23.0

Washington (Bloomingdale) DC, US: 38.921848, -77.013176

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 24, 2022, 7 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 24.0 ppb (23) 0.29 ppb (4) 10.0 μg/m3 (10) 4.0 μg/m3 (17) 23.0
 
May 24, 2022, 6 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 27.0 ppb (25) 0.29 ppb (4) 10.0 μg/m3 (10) 7.0 μg/m3 (30) 30.0
 
May 24, 2022, 5 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 29.0 ppb (27) 0.28 ppb (4) 10.0 μg/m3 (10) 0.0 μg/m3 (0) 27.0
 
May 24, 2022, 5 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 29.0 ppb (27) 0.28 ppb (4) 10.0 μg/m3 (10) 0.0 μg/m3 (0) 27.0
 
May 24, 2022, 4 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 30.0 ppb (28) 0.29 ppb (4) 11.0 μg/m3 (11) 5.0 μg/m3 (21) 28.0
 
May 24, 2022, 4 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 30.0 ppb (28) 0.29 ppb (4) 11.0 μg/m3 (11) 5.0 μg/m3 (21) 28.0
 
May 24, 2022, 3 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 30.0 ppb (28) 0.3 ppb (4) 10.0 μg/m3 (10) 4.0 μg/m3 (17) 28.0
 
May 24, 2022, 3 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 30.0 ppb (28) 0.3 ppb (4) 10.0 μg/m3 (10) 4.0 μg/m3 (17) 28.0
 
May 24, 2022, 2 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 31.0 ppb (29) 0.31 ppb (4) 12.0 μg/m3 (12) 7.0 μg/m3 (30) 30.0
 
May 24, 2022, 2 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 31.0 ppb (29) 0.31 ppb (4) 12.0 μg/m3 (12) 7.0 μg/m3 (30) 30.0
 
May 24, 2022, 1 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 34.0 ppb (32) 0.29 ppb (4) 11.0 μg/m3 (11) 4.0 μg/m3 (17) 32.0
 
May 24, 2022, 1 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 34.0 ppb (32) 0.29 ppb (4) 11.0 μg/m3 (11) 4.0 μg/m3 (17) 32.0
 
May 24, 2022, midnight N/A N/A N/A 5.0 ppb (5) N/A N/A 36.0 ppb (34) 0.28 ppb (4) 14.0 μg/m3 (13) 5.0 μg/m3 (21) 34.0
 
May 24, 2022, midnight N/A N/A N/A 5.0 ppb (5) N/A N/A 36.0 ppb (34) 0.28 ppb (4) 14.0 μg/m3 (13) 5.0 μg/m3 (21) 34.0
 
May 23, 2022, 11 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 38.0 ppb (36) 0.28 ppb (4) 14.0 μg/m3 (13) 2.0 μg/m3 (9) 36.0
 
May 23, 2022, 11 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 38.0 ppb (36) 0.28 ppb (4) 14.0 μg/m3 (13) 2.0 μg/m3 (9) 36.0
 
May 23, 2022, 8 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 44.0 ppb (41) 0.27 ppb (4) 14.0 μg/m3 (13) 1.0 μg/m3 (5) 41.0
 
May 23, 2022, 7 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 44.0 ppb (41) 0.28 ppb (4) 29.0 μg/m3 (27) 4.0 μg/m3 (17) 41.0
 
May 23, 2022, 6 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 47.0 ppb (44) 0.27 ppb (4) 25.0 μg/m3 (24) 3.0 μg/m3 (13) 44.0
 
May 23, 2022, 3 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 40.0 ppb (38) N/A 21.0 μg/m3 (20) 4.0 μg/m3 (17) 38.0
 
May 23, 2022, 2 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 35.0 ppb (33) 0.28 ppb (4) 31.0 μg/m3 (29) 7.0 μg/m3 (30) 33.0
 
May 23, 2022, 11 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 27.0 ppb (25) 0.3 ppb (4) 18.0 μg/m3 (17) 4.0 μg/m3 (17) 25.0
 
May 23, 2022, 10 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 25.0 ppb (24) 0.31 ppb (4) 14.0 μg/m3 (13) 1.0 μg/m3 (5) 24.0
 
May 23, 2022, 10 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 25.0 ppb (24) 0.31 ppb (4) 14.0 μg/m3 (13) 1.0 μg/m3 (5) 24.0
 
May 23, 2022, 9 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 27.0 ppb (25) 0.3 ppb (4) 17.0 μg/m3 (16) 3.0 μg/m3 (13) 25.0
 
May 23, 2022, 3 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 32.0 ppb (30) 0.46 ppb (6) 19.0 μg/m3 (18) 10.0 μg/m3 (42) 42.0
 
May 23, 2022, 2 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 37.0 ppb (35) 0.42 ppb (5) 19.0 μg/m3 (18) 9.0 μg/m3 (38) 38.0
 
May 23, 2022, 1 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 39.0 ppb (37) 0.41 ppb (5) 20.0 μg/m3 (19) 11.0 μg/m3 (46) 46.0
 
May 23, 2022, midnight N/A N/A N/A 2.0 ppb (2) N/A N/A 42.0 ppb (39) 0.4 ppb (5) 16.0 μg/m3 (15) 7.0 μg/m3 (30) 39.0
 
May 22, 2022, 11 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 36.0 ppb (34) 0.43 ppb (5) 15.0 μg/m3 (14) 15.0 μg/m3 (58) 58.0
 
May 22, 2022, 9 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 42.0 ppb (39) 0.4 ppb (5) 22.0 μg/m3 (21) 21.0 μg/m3 (70) 70.0
 
May 22, 2022, 8 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 46.0 ppb (43) 0.42 ppb (5) 20.0 μg/m3 (19) 15.0 μg/m3 (58) 58.0
 
May 22, 2022, 7 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 52.0 ppb (49) 0.45 ppb (6) 18.0 μg/m3 (17) 11.0 μg/m3 (46) 49.0
 
May 22, 2022, 6 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 55.0 ppb (51) 0.45 ppb (6) 18.0 μg/m3 (17) 11.0 μg/m3 (46) 51.0
 
May 22, 2022, 5 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 55.0 ppb (51) 0.44 ppb (5) 18.0 μg/m3 (17) 12.0 μg/m3 (50) 51.0
 
May 22, 2022, 4 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 51.0 ppb (48) 0.43 ppb (5) 17.0 μg/m3 (16) 9.0 μg/m3 (38) 48.0
 
May 22, 2022, 3 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 48.0 ppb (45) 0.43 ppb (5) 17.0 μg/m3 (16) 10.0 μg/m3 (42) 45.0
 
May 22, 2022, 2 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 42.0 ppb (39) 0.41 ppb (5) 16.0 μg/m3 (15) 13.0 μg/m3 (53) 53.0
 
May 22, 2022, 1 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 35.0 ppb (33) 0.38 ppb (5) 15.0 μg/m3 (14) 6.0 μg/m3 (25) 33.0
 
May 22, 2022, 1 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 35.0 ppb (33) 0.38 ppb (5) 15.0 μg/m3 (14) 6.0 μg/m3 (25) 33.0
 
May 22, 2022, noon N/A N/A N/A 4.0 ppb (4) N/A N/A 32.0 ppb (30) 0.37 ppb (5) 14.0 μg/m3 (13) 6.0 μg/m3 (25) 30.0
 
May 22, 2022, 11 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 32.0 ppb (30) 0.38 ppb (5) 16.0 μg/m3 (15) 9.0 μg/m3 (38) 38.0
 
May 22, 2022, 10 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 29.0 ppb (27) 0.39 ppb (5) 18.0 μg/m3 (17) 11.0 μg/m3 (46) 46.0
 
May 22, 2022, 9 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 31.0 ppb (29) 0.39 ppb (5) 18.0 μg/m3 (17) 11.0 μg/m3 (46) 46.0
 
May 22, 2022, 8 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 32.0 ppb (30) 0.39 ppb (5) 20.0 μg/m3 (19) 11.0 μg/m3 (46) 46.0
 
May 22, 2022, 7 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 32.0 ppb (30) 0.41 ppb (5) 20.0 μg/m3 (19) 10.0 μg/m3 (42) 42.0
 
May 22, 2022, 5 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 33.0 ppb (31) 0.44 ppb (5) 21.0 μg/m3 (20) 14.0 μg/m3 (55) 55.0
 
May 22, 2022, 3 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 35.0 ppb (33) 0.44 ppb (5) 21.0 μg/m3 (20) 14.0 μg/m3 (55) 55.0
 
May 22, 2022, 2 a.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 30.0 ppb (28) 0.51 ppb (6) 22.0 μg/m3 (21) 13.0 μg/m3 (53) 53.0
 
May 22, 2022, 1 a.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 35.0 ppb (33) 0.49 ppb (6) 21.0 μg/m3 (20) 14.0 μg/m3 (55) 55.0
 
May 22, 2022, midnight N/A N/A N/A 7.0 ppb (7) N/A N/A 42.0 ppb (39) 0.47 ppb (6) 19.0 μg/m3 (18) 13.0 μg/m3 (53) 53.0
 
May 21, 2022, 11 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 51.0 ppb (48) 0.44 ppb (5) 22.0 μg/m3 (21) 13.0 μg/m3 (53) 53.0
 
May 21, 2022, 10 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 54.0 ppb (50) 0.43 ppb (5) 22.0 μg/m3 (21) 12.0 μg/m3 (50) 50.0
 
May 21, 2022, 9 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 56.0 ppb (55) 0.42 ppb (5) 23.0 μg/m3 (22) 13.0 μg/m3 (53) 55.0
 
May 21, 2022, 8 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 57.0 ppb (58) 0.42 ppb (5) 24.0 μg/m3 (23) 6.0 μg/m3 (25) 58.0
 
May 21, 2022, 7 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 58.0 ppb (61) 0.44 ppb (5) 23.0 μg/m3 (22) 17.0 μg/m3 (62) 62.0
 
May 21, 2022, 6 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 66.0 ppb (87) 0.42 ppb (5) 27.0 μg/m3 (25) 15.0 μg/m3 (58) 87.0
 
May 21, 2022, 5 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 72.0 ppb (102) 0.47 ppb (6) 27.0 μg/m3 (25) 14.0 μg/m3 (55) 102.0
 
May 21, 2022, 4 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 67.0 ppb (91) 0.44 ppb (5) 25.0 μg/m3 (24) 16.0 μg/m3 (60) 91.0
 
May 21, 2022, 3 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 66.0 ppb (87) 0.47 ppb (6) 28.0 μg/m3 (26) 16.0 μg/m3 (60) 87.0
 
May 21, 2022, 2 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 57.0 ppb (58) 0.48 ppb (6) 26.0 μg/m3 (25) 16.0 μg/m3 (60) 60.0
 
May 21, 2022, 1 p.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 46.0 ppb (43) 0.51 ppb (6) 24.0 μg/m3 (23) 17.0 μg/m3 (62) 62.0
 
May 21, 2022, 1 p.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 46.0 ppb (43) 0.51 ppb (6) 24.0 μg/m3 (23) 17.0 μg/m3 (62) 62.0
 
May 21, 2022, noon N/A N/A N/A 8.0 ppb (8) N/A N/A 40.0 ppb (38) 0.48 ppb (6) 25.0 μg/m3 (24) 15.0 μg/m3 (58) 58.0
 
May 21, 2022, 10 a.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 24.0 ppb (23) 0.51 ppb (6) 26.0 μg/m3 (25) 9.0 μg/m3 (38) 38.0
 
May 21, 2022, 9 a.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 29.0 ppb (27) 0.42 ppb (5) 24.0 μg/m3 (23) 15.0 μg/m3 (58) 58.0
 
May 21, 2022, 8 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 36.0 ppb (34) 0.41 ppb (5) 24.0 μg/m3 (23) 12.0 μg/m3 (50) 50.0
 
May 21, 2022, 4 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 45.0 ppb (42) 0.46 ppb (6) 27.0 μg/m3 (25) 17.0 μg/m3 (62) 62.0
 
May 21, 2022, 3 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 48.0 ppb (45) 0.47 ppb (6) 27.0 μg/m3 (25) 16.0 μg/m3 (60) 60.0
 
May 21, 2022, 2 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 51.0 ppb (48) 0.46 ppb (6) 27.0 μg/m3 (25) 17.0 μg/m3 (62) 62.0
 
May 21, 2022, 1 a.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 46.0 ppb (43) 0.5 ppb (6) 29.0 μg/m3 (27) 17.0 μg/m3 (62) 62.0
 
May 21, 2022, midnight N/A N/A N/A 16.0 ppb (16) N/A N/A 40.0 ppb (38) 0.55 ppb (7) 30.0 μg/m3 (28) 17.0 μg/m3 (62) 62.0
 
May 20, 2022, 11 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 48.0 ppb (45) 0.53 ppb (6) 31.0 μg/m3 (29) 18.0 μg/m3 (64) 64.0
 
May 20, 2022, 10 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 54.0 ppb (50) 0.49 ppb (6) 31.0 μg/m3 (29) 21.0 μg/m3 (70) 70.0
 
May 20, 2022, 9 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 61.0 ppb (71) 0.5 ppb (6) 33.0 μg/m3 (31) 19.0 μg/m3 (66) 71.0
 
May 20, 2022, 7 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 65.0 ppb (84) 0.53 ppb (6) 32.0 μg/m3 (30) 20.0 μg/m3 (68) 84.0
 
May 20, 2022, 6 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 64.0 ppb (81) 0.5 ppb (6) 30.0 μg/m3 (28) 19.0 μg/m3 (66) 81.0
 
May 20, 2022, 5 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 64.0 ppb (81) 0.5 ppb (6) 31.0 μg/m3 (29) 15.0 μg/m3 (58) 81.0
 
May 20, 2022, 4 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 65.0 ppb (84) 0.52 ppb (6) 33.0 μg/m3 (31) 23.0 μg/m3 (74) 84.0
 
May 20, 2022, 3 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 56.0 ppb (55) 0.52 ppb (6) 33.0 μg/m3 (31) 14.0 μg/m3 (55) 55.0
 
May 20, 2022, 2 p.m. N/A N/A N/A 14.0 ppb (14) N/A N/A 45.0 ppb (42) 0.57 ppb (7) 33.0 μg/m3 (31) 18.0 μg/m3 (64) 64.0
 
May 20, 2022, 1 p.m. N/A N/A N/A 17.0 ppb (17) N/A N/A 39.0 ppb (37) 0.58 ppb (7) 36.0 μg/m3 (34) 16.0 μg/m3 (60) 60.0
 
May 20, 2022, 11 a.m. N/A N/A N/A 14.0 ppb (14) N/A N/A 31.0 ppb (29) 0.53 ppb (6) 21.0 μg/m3 (20) 20.0 μg/m3 (68) 68.0
 
May 20, 2022, 10 a.m. N/A N/A N/A 14.0 ppb (14) N/A N/A 25.0 ppb (24) 0.57 ppb (7) 19.0 μg/m3 (18) 10.0 μg/m3 (42) 42.0
 
May 20, 2022, 9 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 31.0 ppb (29) 0.46 ppb (6) 18.0 μg/m3 (17) 10.0 μg/m3 (42) 42.0
 
May 20, 2022, 8 a.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 28.0 ppb (26) 0.49 ppb (6) 18.0 μg/m3 (17) 9.0 μg/m3 (38) 38.0
 
May 20, 2022, 7 a.m. N/A N/A N/A 20.0 ppb (19) N/A N/A 19.0 ppb (18) 0.6 ppb (7) 23.0 μg/m3 (22) 11.0 μg/m3 (46) 46.0
 
May 20, 2022, 6 a.m. N/A N/A N/A 34.0 ppb (33) N/A N/A 3.0 ppb (3) 0.75 ppb (10) 24.0 μg/m3 (23) 14.0 μg/m3 (55) 55.0
 
May 20, 2022, 5 a.m. N/A N/A N/A 31.0 ppb (30) N/A N/A 7.0 ppb (7) 0.8 ppb (10) 23.0 μg/m3 (22) 13.0 μg/m3 (53) 53.0
 
May 20, 2022, 4 a.m. N/A N/A N/A 34.0 ppb (33) N/A N/A 10.0 ppb (10) 0.77 ppb (10) 23.0 μg/m3 (22) 12.0 μg/m3 (50) 50.0
 
May 20, 2022, 3 a.m. N/A N/A N/A 36.0 ppb (34) N/A N/A 7.0 ppb (7) 0.78 ppb (10) 28.0 μg/m3 (26) 13.0 μg/m3 (53) 53.0
 
May 20, 2022, 2 a.m. N/A N/A N/A 26.0 ppb (25) N/A N/A 15.0 ppb (14) 0.72 ppb (8) 27.0 μg/m3 (25) 12.0 μg/m3 (50) 50.0
 
May 20, 2022, 1 a.m. N/A N/A N/A 18.0 ppb (17) N/A N/A N/A 0.61 ppb (7) 23.0 μg/m3 (22) 9.0 μg/m3 (38) 38.0
 
May 20, 2022, 1 a.m. N/A N/A N/A 18.0 ppb (17) N/A N/A 25.0 ppb (24) 0.61 ppb (7) 23.0 μg/m3 (22) 9.0 μg/m3 (38) 38.0
 
May 20, 2022, midnight N/A N/A N/A 7.0 ppb (7) N/A N/A 47.0 ppb (44) 0.38 ppb (5) 20.0 μg/m3 (19) 13.0 μg/m3 (53) 53.0
 
May 20, 2022, midnight N/A N/A N/A 7.0 ppb (7) N/A N/A 47.0 ppb (44) 0.38 ppb (5) 20.0 μg/m3 (19) 13.0 μg/m3 (53) 53.0
 
May 19, 2022, 11 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 54.0 ppb (50) 0.33 ppb (4) 17.0 μg/m3 (16) 10.0 μg/m3 (42) 50.0
 
May 19, 2022, 10 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 56.0 ppb (55) 0.3 ppb (4) 18.0 μg/m3 (17) 21.0 μg/m3 (70) 70.0
 
May 19, 2022, 9 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 56.0 ppb (55) 0.34 ppb (4) 17.0 μg/m3 (16) 8.0 μg/m3 (34) 55.0
 
May 19, 2022, 8 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 55.0 ppb (51) 0.37 ppb (5) 15.0 μg/m3 (14) 2.0 μg/m3 (9) 51.0
 
May 19, 2022, 7 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 54.0 ppb (50) 0.35 ppb (4) 21.0 μg/m3 (20) 8.0 μg/m3 (34) 50.0
 
May 19, 2022, 7 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 54.0 ppb (50) 0.35 ppb (4) 21.0 μg/m3 (20) 8.0 μg/m3 (34) 50.0
 
May 19, 2022, 4 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 51.0 ppb (48) 0.58 ppb (7) 12.0 μg/m3 (12) -4.0 μg/m3 (0) 48.0
 
May 19, 2022, 2 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 40.0 ppb (38) 0.36 ppb (5) 11.0 μg/m3 (11) 8.0 μg/m3 (34) 38.0
 
May 19, 2022, 6 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 28.0 ppb (26) 0.35 ppb (4) 12.0 μg/m3 (12) 7.0 μg/m3 (30) 30.0
 
May 19, 2022, 5 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 36.0 ppb (34) 0.33 ppb (4) 13.0 μg/m3 (13) 4.0 μg/m3 (17) 34.0
 
May 19, 2022, 4 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 39.0 ppb (37) 0.32 ppb (4) 14.0 μg/m3 (13) 6.0 μg/m3 (25) 37.0
 
May 19, 2022, 3 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 39.0 ppb (37) 0.34 ppb (4) 14.0 μg/m3 (13) 7.0 μg/m3 (30) 37.0
 
May 19, 2022, 2 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 37.0 ppb (35) 0.36 ppb (5) 15.0 μg/m3 (14) 5.0 μg/m3 (21) 35.0
 
May 19, 2022, 1 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 38.0 ppb (36) 0.39 ppb (5) 15.0 μg/m3 (14) 13.0 μg/m3 (53) 53.0
 
May 18, 2022, 11 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 46.0 ppb (43) 0.32 ppb (4) 15.0 μg/m3 (14) 4.0 μg/m3 (17) 43.0
 
May 18, 2022, 10 p.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 43.0 ppb (40) 0.34 ppb (4) 15.0 μg/m3 (14) 7.0 μg/m3 (30) 40.0
 
May 18, 2022, 9 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 46.0 ppb (43) 0.32 ppb (4) 15.0 μg/m3 (14) 3.0 μg/m3 (13) 43.0
 
May 18, 2022, 8 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 50.0 ppb (47) 0.27 ppb (4) 15.0 μg/m3 (14) 3.0 μg/m3 (13) 47.0
 
May 18, 2022, 7 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 54.0 ppb (50) 0.26 ppb (4) 15.0 μg/m3 (14) 7.0 μg/m3 (30) 50.0
 
May 18, 2022, 5 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 47.0 ppb (44) 0.25 ppb (3) 13.0 μg/m3 (13) -4.0 μg/m3 (0) 44.0
 
May 18, 2022, 4 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 42.0 ppb (39) 0.24 ppb (3) 12.0 μg/m3 (12) 2.0 μg/m3 (9) 39.0
 
May 18, 2022, 4 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 42.0 ppb (39) 0.24 ppb (3) 12.0 μg/m3 (12) 2.0 μg/m3 (9) 39.0
 
May 18, 2022, 3 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 36.0 ppb (34) 0.23 ppb (3) 10.0 μg/m3 (10) -2.0 μg/m3 (0) 34.0
 
May 18, 2022, 3 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 36.0 ppb (34) 0.23 ppb (3) 10.0 μg/m3 (10) -2.0 μg/m3 (0) 34.0
 
May 18, 2022, 2 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 31.0 ppb (29) 0.23 ppb (3) 10.0 μg/m3 (10) 0.0 μg/m3 (0) 29.0
 
May 18, 2022, 2 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 31.0 ppb (29) 0.23 ppb (3) 10.0 μg/m3 (10) 0.0 μg/m3 (0) 29.0
 
May 18, 2022, 1 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 28.0 ppb (26) 0.23 ppb (3) 12.0 μg/m3 (12) 3.0 μg/m3 (13) 26.0
 
May 18, 2022, 1 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 28.0 ppb (26) 0.23 ppb (3) 12.0 μg/m3 (12) 3.0 μg/m3 (13) 26.0
 
May 18, 2022, noon N/A N/A N/A 4.0 ppb (4) N/A N/A 27.0 ppb (25) 0.24 ppb (3) 12.0 μg/m3 (12) 2.0 μg/m3 (9) 25.0
 
May 18, 2022, noon N/A N/A N/A 4.0 ppb (4) N/A N/A 27.0 ppb (25) 0.24 ppb (3) 12.0 μg/m3 (12) 2.0 μg/m3 (9) 25.0
 
May 18, 2022, 11 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 24.0 ppb (23) 0.25 ppb (3) 10.0 μg/m3 (10) 4.0 μg/m3 (17) 23.0
 
May 18, 2022, 10 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 24.0 ppb (23) 0.24 ppb (3) 9.0 μg/m3 (9) 2.0 μg/m3 (9) 23.0
 
May 18, 2022, 2 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 43.0 ppb (40) 0.26 ppb (4) 18.0 μg/m3 (17) 5.0 μg/m3 (21) 40.0
 
May 18, 2022, 1 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 50.0 ppb (47) 0.27 ppb (4) 21.0 μg/m3 (20) 8.0 μg/m3 (34) 47.0
 
May 18, 2022, midnight N/A N/A N/A 5.0 ppb (5) N/A N/A 56.0 ppb (55) 0.29 ppb (4) 21.0 μg/m3 (20) 8.0 μg/m3 (34) 55.0
 
May 17, 2022, 11 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 62.0 ppb (74) 0.28 ppb (4) 28.0 μg/m3 (26) 12.0 μg/m3 (50) 74.0
 
May 17, 2022, 10 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 63.0 ppb (78) 0.26 ppb (4) 28.0 μg/m3 (26) 10.0 μg/m3 (42) 78.0
 
May 17, 2022, 9 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 63.0 ppb (78) 0.25 ppb (3) 27.0 μg/m3 (25) 7.0 μg/m3 (30) 78.0
 
May 17, 2022, 9 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 63.0 ppb (78) 0.25 ppb (3) 27.0 μg/m3 (25) 7.0 μg/m3 (30) 78.0
 
May 17, 2022, 8 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 62.0 ppb (74) 0.26 ppb (4) 25.0 μg/m3 (24) 2.0 μg/m3 (9) 74.0
 
May 17, 2022, 7 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 61.0 ppb (71) 0.27 ppb (4) 23.0 μg/m3 (22) 4.0 μg/m3 (17) 71.0
 
May 17, 2022, 7 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 61.0 ppb (71) 0.27 ppb (4) 23.0 μg/m3 (22) 4.0 μg/m3 (17) 71.0
 
May 17, 2022, 6 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 58.0 ppb (61) 0.29 ppb (4) 21.0 μg/m3 (20) 2.0 μg/m3 (9) 61.0
 
May 17, 2022, 6 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 58.0 ppb (61) 0.29 ppb (4) 21.0 μg/m3 (20) 2.0 μg/m3 (9) 61.0
 
May 17, 2022, 5 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 59.0 ppb (65) 0.26 ppb (4) 21.0 μg/m3 (20) 4.0 μg/m3 (17) 65.0
 
May 17, 2022, 5 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 59.0 ppb (65) 0.26 ppb (4) 21.0 μg/m3 (20) 4.0 μg/m3 (17) 65.0
 
May 17, 2022, 4 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 59.0 ppb (65) 0.27 ppb (4) 19.0 μg/m3 (18) 5.0 μg/m3 (21) 65.0
 
May 17, 2022, 4 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 59.0 ppb (65) 0.27 ppb (4) 19.0 μg/m3 (18) 5.0 μg/m3 (21) 65.0
 
May 17, 2022, 3 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 54.0 ppb (50) 0.29 ppb (4) 21.0 μg/m3 (20) 3.0 μg/m3 (13) 50.0
 
May 17, 2022, 3 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 54.0 ppb (50) 0.29 ppb (4) 21.0 μg/m3 (20) 3.0 μg/m3 (13) 50.0
 
May 17, 2022, 1 p.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 42.0 ppb (39) 0.34 ppb (4) 21.0 μg/m3 (20) 4.0 μg/m3 (17) 39.0
 
May 17, 2022, noon N/A N/A N/A 14.0 ppb (14) N/A N/A 30.0 ppb (28) 0.47 ppb (6) 23.0 μg/m3 (22) 6.0 μg/m3 (25) 28.0
 
May 17, 2022, 11 a.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 29.0 ppb (27) 0.35 ppb (4) 16.0 μg/m3 (15) 7.0 μg/m3 (30) 30.0
 
May 17, 2022, 10 a.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 32.0 ppb (30) 0.32 ppb (4) 15.0 μg/m3 (14) 0.0 μg/m3 (0) 30.0
 
May 17, 2022, 10 a.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 32.0 ppb (30) 0.32 ppb (4) 15.0 μg/m3 (14) 0.0 μg/m3 (0) 30.0
 
May 17, 2022, 9 a.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 34.0 ppb (32) 0.28 ppb (4) 12.0 μg/m3 (12) 6.0 μg/m3 (25) 32.0
 
May 17, 2022, 8 a.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 34.0 ppb (32) 0.27 ppb (4) 12.0 μg/m3 (12) 3.0 μg/m3 (13) 32.0
 
May 17, 2022, 5 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 36.0 ppb (34) 0.3 ppb (4) 11.0 μg/m3 (11) 7.0 μg/m3 (30) 34.0
 
May 17, 2022, 4 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 37.0 ppb (35) 0.31 ppb (4) 12.0 μg/m3 (12) 8.0 μg/m3 (34) 35.0
 
May 17, 2022, 3 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 37.0 ppb (35) 0.32 ppb (4) 12.0 μg/m3 (12) 4.0 μg/m3 (17) 35.0
 
May 17, 2022, 2 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 42.0 ppb (39) 0.29 ppb (4) 13.0 μg/m3 (13) 4.0 μg/m3 (17) 39.0
 
May 17, 2022, 1 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 46.0 ppb (43) 0.27 ppb (4) 11.0 μg/m3 (11) 2.0 μg/m3 (9) 43.0
 
May 17, 2022, midnight N/A N/A N/A 2.0 ppb (2) N/A N/A 49.0 ppb (46) 0.26 ppb (4) 13.0 μg/m3 (13) 1.0 μg/m3 (5) 46.0
 
May 16, 2022, 11 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 50.0 ppb (47) 0.27 ppb (4) 16.0 μg/m3 (15) 4.0 μg/m3 (17) 47.0
 
May 16, 2022, 9 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 46.0 ppb (43) 0.39 ppb (5) 19.0 μg/m3 (18) -3.0 μg/m3 (0) 43.0
 
May 16, 2022, 8 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 51.0 ppb (48) 0.32 ppb (4) 15.0 μg/m3 (14) 14.0 μg/m3 (55) 55.0
 
May 16, 2022, 7 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 50.0 ppb (47) 0.34 ppb (4) 15.0 μg/m3 (14) 2.0 μg/m3 (9) 47.0
 
May 16, 2022, 6 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 39.0 ppb (37) 0.43 ppb (5) 15.0 μg/m3 (14) 5.0 μg/m3 (21) 37.0
 
May 16, 2022, 5 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 27.0 ppb (25) 0.51 ppb (6) 14.0 μg/m3 (13) 7.0 μg/m3 (30) 30.0
 
May 16, 2022, 5 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 27.0 ppb (25) 0.51 ppb (6) 14.0 μg/m3 (13) 7.0 μg/m3 (30) 30.0
 
May 16, 2022, 4 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 19.0 ppb (18) 0.54 ppb (6) 16.0 μg/m3 (15) 9.0 μg/m3 (38) 38.0
 
May 16, 2022, 3 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 17.0 ppb (16) 0.5 ppb (6) 17.0 μg/m3 (16) 12.0 μg/m3 (50) 50.0